Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33d884eb15ced219a24134ca2c89d9800fa057fbc0b16633bad46ab2bdd4ce71' 
  AND token = 'BWraYEzX5WhmrGAjbKq7hfaeEp6taZqBKQFQUGtQxWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}