Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2861f0fdd4b99aa65d35d949ea599fd4906dddbc789404e323ec8526fa25e4b5' 
  AND token = 'm5QmfJLuPt9eD3cray4QtuoBsxgeDPiBdP2kCuWZ3D0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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