Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e70e5bc679c79c3beb71ab6bbbc464fe38ac1fcdbf3ec9fc290a06935e410cc9' 
  AND token = '5WN6DOWOpj/5/tj32RIVXSOcGmTY9bR/fKasooG25rY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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