Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c37da01fc1e698667be0c0448c7065c69a5b2951d95e990606a8d74b0afaa5dc' 
  AND token = 'M61G87rBH2612nvgaimCL8GEjrvbbtf+vh1gFnTzA60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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