Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b91a22309b253785c6de7b8765afa1bcad67021a17d2b981cfbc6032d6e7504d' 
  AND token = 'Uz2SHQMKWg6kvFZ7s0bN1UHjVTsivkm9N0Yb7dgwfwA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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