Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2f572477bec77a1614adcae3d3f8a81a206acf8bb314746dced128b83b2d298' 
  AND token = 'ps+k/DN3p07yC/RblWgDhIg+wkifizI6B76AUZyq1zY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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