Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70dab23e84c8ddc0e9425e58eadf7673323561ad48dfa984511468896d83a787' 
  AND token = '75AzRpnpyMWlcLafrQxV6ruNAV/xE4XYxDh2DSL1rJo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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