Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f660b54a07f1d79bfd85bd3fa5af2eb970825bce6cfbb4d7950f254f7109112b' 
  AND token = '727XqfdoV6fmFa/8TZjmliPxETpRPAOYKmeaACU2dqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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