Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e7da56fd6b429a96e6cb8637e2e028cd85ea105c0b17ba454b94b78b8297050' 
  AND token = 'wp7frWnJqxomKuGde60zhtsjTh7mdIPvExXVtw+u4LI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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