SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2fd527d2445eab572d4e757993d31948f6f078b4f5abebd2b459edeb8214632' 
  AND token = 'LITJsFVEKjaEQaP+MiG11y9DrimcNqxRzMkR1wGLYFw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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