Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c7f969ea226ec14126b7af4aa1ee7dd0e7ddff137ad895b7f7c4a1cacdbabfa' 
  AND token = 'aWYJvu6SfSio1WlTyYU2BEob/59SZA9Tq3wiOhUsWWY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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