Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ca5aaa61e7e5abc4141f32c48012d55d25eaf1c101c80fc198556491e86e7d2' 
  AND token = 'C2qjGxpxAkaP1drV9ssBjF7n7pBwuYgPg2No3Ea2nJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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