Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2867a5e9be59b267e226854397462ab3f4aa7ab2fd377f1a0370b6e5dce0c313' 
  AND token = '12YaSNKqCW6Hlijvj+9D60GkU8piWD/R7cHWz+Cmaes=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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