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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '091ed0ea14fdb6bc42bb74a96361bbfc388c07de72ebbb8d3f062c5cff918d7d' 
  AND token = 'cRY6d9pCIeRpWEdz/Vey0rJDUFGbhUvSYO/Fd71qM1g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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