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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33bcad9cbe483b706bfe9b75607f97902ba572b1f076c5c7fc317e9bdb7ea8a9' 
  AND token = 'RktP8sTSMg5JYcQXoDfm1fXKLZKxuwKJqAmo/vdEZRs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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