Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9856b3d20ea3b34488ba8b7a41f613efe77bf7836d653c5a6bc5c47dfd34887' 
  AND token = 'piJZaD20OWlxqpPsSCrFczpnnNoGe0UBy2PlPJxke1s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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