Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b25a4907cb1ce029ebe91f5db3e9eea4b06734178d49ce540a4cfd01a077b807' 
  AND token = 'K3QXEfOAK/wGPHRXx26y9pILVjBmQoVjYD/00sIBuRk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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