Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45e305cc90f71dfbccaf2d19c3a52be1145909c4f9a277da0bb748f6ef07327f' 
  AND token = 'OUxCmjwazLN7fBwDwitmCJ9PbPRB58lL/pO3gqGO5NI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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