Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '85a7cb9efb0c6cf18e45ec83bd772ef9cd496dbd04461c3a24f080d713b5349a' 
  AND token = 'cP56NRCCONQ6D+tTLtzj9QHHrl9SFWyI8Qyv2QyWlQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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