Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66aaacbfc420db1ab1c978fbffbdfff500ad085ccb40aed580703be0e6370a5a' 
  AND token = 'mQ089E313QXogv0qo8vU3CxdojdqZ7fMtyYA5pL71e8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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