Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e393d3a92e69396d67050f1da65f0213157b5f16bbf06e32edbd3427bbc94d3a' 
  AND token = 'f6rNY8gB/lcidHsYmR5/rh2SLcO9Lz8H2ryHLjX56w8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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