SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22fd47720233d2e2bf56ee45954fd63b7b97c79e78caad330e6e7fe61587aa8d' 
  AND token = 'uGDrT6y+qxhoZXvW0GP/+48g/Oy3ja4aBLRhwUpOJvM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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