Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45b1770ba807baea6f49de8b7192f035c9cc0a961ff4bdf964d787d2d9262984' 
  AND token = 'RLxCc+NNUlS1Moc6msi+IYQDG7gT8fnnPdBhqC33LN4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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