SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed2a1bb24357cb3884d159d863bf3416ee78fc129df326d27810067197bcde41' 
  AND token = 'Y3kEXjXvMBZgSFp/xqT1ItQ6H64tkf4pwrJlBnvixrw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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