Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c63fa8266c2d5569c0c76692faa6724187c3529a969292b35b49190a7db8c9d8' 
  AND token = 'nfaGi6aiylMfSuoJX42fXPAbB5L9RprIR96ZBXdM1wc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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