Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0856a544ce74ef9e28e247c1f8171de1421de5b73a6ad6436290e5e22fb6ec77' 
  AND token = 'dgG74BY52fsjgkitzqEnu78b1o+iPKuEleZKBCYfWzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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