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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8044ae589b64ca82dbe62acdb60ce3781d03985523271e1412eec5c7f024c16' 
  AND token = 'ZW7xBZW9XhI5ZXC7GnBd3YoJ33T5GNfi2rsUUBKy/c4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}