Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9eba68617536cac90f8367bd47ed5afb2dfc474c13b2068009abbc2053a6022' 
  AND token = 'XA8xG6uzlHLqxV7LyztM7cvszASGjuPV6TBovcZDRJo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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