Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92a0e4490bb7e243ff9fb74c273b28c5f5200ed4b73bf92828031814908ec0dd' 
  AND token = '2Rx963YSYY23RvbeYZ1Bb8/nAps0TGZ09rpf24LekbM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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