Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c87fe8ccbfa28534792ef3ba908d5046e2eded9ed54cc8c3c72ca2144ca0ff88' 
  AND token = 'jW5eIV8rgsw0Z+64fXVwdNFBMwfdJ4daV/VaqPZkjQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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