Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27de215001dcb095f51d46000b12211672b6eb446ddfe8b26e33fe5589a61329' 
  AND token = 'Ed9thqmDca8b6cjtCtJ02+hrZdi9js90JQsVtP7lLT0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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