Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71037646949dfa2e25e209881f0181094a9dbc8fa66b467af3c90d11d7d8fc50' 
  AND token = '8FhvWoJ/Eed5D7D4ltjpszWT1L2vVH2iS+Gkl3Kf9as=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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