Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3274a66b76ce25000f02ef626d323b1ea312fe2c5d83e341073a182b640c12e0' 
  AND token = 'LkzjSmZu5kIlDsoE5LQGGCwvxsSEK0CcZwu24bZPSv8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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