Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bb94802030d86f883ff7a6065f4353e5cec23c3337e1d50226168b62e410eb0' 
  AND token = 'KP2NcL5WyVISxWq5vMATcnDlG/otnE00POiVQTLYDgw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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