Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15f0fcfdef66ac031fd8894bfed665470f16c4b0c57dc1ee16188919982447a7' 
  AND token = 'tnP25D65IKkQjgJntFcf9Z1tHCe07KnHwNffSp0Gf0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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