Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'abb6672e8e9a7ef7cfff4c013ce271489f0c0a422ecd479a1f01a15b3130f91c' 
  AND token = 'HIc4PF8j4uTo2uJLO9kP8SUEsS+vVfRYTtzcyXFvHSk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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