Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f053e5dc826544ccab093d2befe35ee7c215c0aa27e93d7bc8529bbe485a7125' 
  AND token = '1gM2UavUnCeoJBNFxCehj/Oen/ZqVgoHOUKDuTbsoHQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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