Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30e4bdae16b848e6084468cdeeacfe4341afae809daa8230f4c4596c54d51023' 
  AND token = 's83vETs4S4D0/LB+BIi752Kx+PEYnyuudlg16qMOFk4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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