Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed7bbff64927225f941b23e1d5fa1d245ecc2840694dac399e53c820830199f5' 
  AND token = 'TIlrjAJhcJ+OaROsL9mbyjwXRNQyS6LlU1d5ZkgUC9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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