Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7531341f4f7ea289a13800949f48abfd69340f194ea89bbb5c83c11b48d000e' 
  AND token = '0RPBNq3SbhwfGW6TEGjUSbjrGA+gAwp8IpBP+KGFEwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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