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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4034683894f844cca9826db1526c1dd3b0c842c0d2d56f0f3272b4776ec506c5' 
  AND token = 'ABNbSs4MgvX7p+KeAebpo9wAF38lu7/2W32o8ACfi1g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}