Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '572968c408f9438fc0edfd536ff449d6706ecc6ed779ade2bfd2654f30638c91' 
  AND token = 'F5nPLIPQajp+lp3ZReXU2HMljv8i+zbwuIII78JMd+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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