SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06822b2446eec13b91dd4005158d3d39289924db57859d6c1acb121f9dc828d5' 
  AND token = 'azmOw/vRT4MZ2POkJnYLyMlkEXXTpugG/7Vk/Q5Ks7I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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