SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78aad14a4de3c97afee7fa6b0ac0e565f498a13cdf710c0fa8585f56502488ba' 
  AND token = 'PItuJV8JYuajZqwCEQVqymVjPg0Giv+W0F5dqbNU2S8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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