Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b2284df549709a6d248aa41a6ee9780cbe72ad2be898a19f607bd153e15839e' 
  AND token = 'StwWlIk+7I9aMzxGIPZi1IJQ+sUJqnsLSK1M4n8e9QM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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