Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f98f97cea6615d0edc98da56fcdc09be9b294db05c40cc0f174cd2dfaf62c9d0' 
  AND token = 'SsTS7dz4c9LfkjBTNBeT8fOkwmHvv2MtJtR6cvb6H1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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