Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bfbe44cd45ab97fc0a1993b89fd6f8fbc564b6dacd0d2cbfeb8d33dec64dcc65' 
  AND token = '6L4wyuT14oYO3V0FsxcyceHgeR8hnBGJL0qll4W331A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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