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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd57e2780825b70d25fbd708498c9aef3ea2c84a4adb5dce63f96d470c1827ac0' 
  AND token = 'aNOkPrARQbfhDdZrdyX+8wFHOGjk3BZny5KH+RqrCII=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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