SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4305fa955125ecb7e80b82a6edf5889a6170c7fcc289e069341c2c55ecdc07b8' 
  AND token = 'NgmGpzW+Ap3tozkwZFgj/8bSLrOunSf3OvnAQQq2VEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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