Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7766324af864779796bb6af2756d1cc7b0b50feb54eaacb3a6ee0a3759bae113' 
  AND token = '5t/EYaruVePkjUcFWRjjbyp4Bil3JyHCO32Kur2MnWo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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