Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7378f3f8c2a8ae2776f22e57d82cf95cf2b84e9edfdc46f60c0a9aae02fc658c' 
  AND token = 'PqtgMba3LC+PNHlIrav7YCHyo04aldx3S4Z+mynrzMc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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