SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2bc8fff23e5135aa42c20431d450b4c256bff208304f6c5cc8d89acb2a7c7eb8' 
  AND token = 'hwGy/gGl1AJ8bYLKMJACDSZISB3PQ1Or8u/drRs/RC4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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