Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75901e427c5b8acb0c1d372a497c428a67a4fab4800e671928123f03582f162f' 
  AND token = 'U+ISWckfhA7rdkZQ/QZABfD6Fq8/Dqr2VMidxmrFsY4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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