Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93786de3db793a727b20159cf3ad617c4c12fb1bfd0865b1c213381e4f60b831' 
  AND token = 'oQwFynno3pmLSRc4HzoLVJ9vCbJCeHtgXfa3Mcmsmy4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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