Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5011b10bbc4d45c44f12217a73f903ab0b887efbd689c3d2c50f5c230231eca0' 
  AND token = '+BdHKbysNbyuqiLH512LPuvU8sNqDuZuDpDNjUpRWuw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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