Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65dc794478bb1fb63dcd2788819de67a586203d7e552b0d0b3cf95df4fd37d25' 
  AND token = 'vXSVFBeyIVffREUvLTazd7hAkWm1FdiTVC78AY4rQ5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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