Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5004a2ecb9f008d2ed232198d24d3e6cd4d4f60a124cb6f851f7f8bc6a9601b7' 
  AND token = 'pJpC2hFJgb4QrlMJZjyR69xcZ25vOEAzX3STdLYHgb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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