Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbd663dd6c7636cd5872fc1442b2b3109a9626de1664f97f5557459fc4d54e0f' 
  AND token = 'jLOn2TddOx9wQOsAn9azqHkY5+7/L4ZRhn13ydfd0wY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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