Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87df5608e2f2c101b0ec13e3531e8d2381a138eadcf16f0084c29dcd6326e088' 
  AND token = 'oKBAQRitfjfuBtQWWf7Nby8g/GH0u2egxqBvrADW7QU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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