Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de1f42ab9d61c20ed6ebfd29841b72b81a4e5aa65f16d98220cffba5926b20d1' 
  AND token = '1i+/fh0qcQb6myGxUc9ZEMC2vr/SsuBB+kEM+FJ3ddk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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