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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2ab57eda31255e2459f8623e17f4259099a35aa29d2ee228f03fed5f799e52e9' 
  AND token = 'f1b3lCMUka8+fWirZ//8rBS5no3SNzqZqWwMQ6lHoww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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