Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba64ad9782ff1fb004f4664d7e69f5b1f0ea0f8e55b97a70fb0d94c96d2e2cc6' 
  AND token = 'gtkwle7lvpoIYBwp4SfKi++SvziQ8vQP+l0wOv3p3Aw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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