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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f59fd840f76bef0950078cbe95d1ffc8e9aecab3fe4507e9d0ce5c31f8d6e128' 
  AND token = 'WGCTcB0rENFZ/oIvW9jkWbEG37oxNb1Va4TCAn1mMtQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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