Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b087beb100feb9f97562b450f953a474aa1d51797d43a1efc6894a273be167a' 
  AND token = 'ZbD1basVtnLw6sZFmzbw+Y6vyD7zU810gO4U91BUuCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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