Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f6a638d1a412471fc2ce26b3f55f6146b752ca46e0bea347526b0ffcba1e310' 
  AND token = 'uU8a7LeoAaFUli8pQDfY/kAKzvPn8te+/xMoq3c9lNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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