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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f98a759f85cd210abcbdb325babe328dec27c27d08818094dc488e16f9f00c5' 
  AND token = 'kxtkW5qI9TcG84+I5OHSH3dHi0iuo0P+yHdLm0Kf4bU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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