Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89d29658e3cb41ed02e327441663cd3a1e546af0aa879ef32ceebd2617bac40e' 
  AND token = 'AdkGmxh1aqDz8KAoCyIVInTK37hVyTLzKouJ/qFWvM0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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