Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4137bde3e25c1bef9c331fbc7e7bf2707b80a469ba99736b00b3ad2a7f1c513' 
  AND token = 'KGeqL047Iq57GzBaGPPcXuiwB0g2329y9LCW03Htxyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}