Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e30f006f31a17646926c050b81e100224b81547603cecd466b66e00c382729d8' 
  AND token = 'Kc+ngbqLJ1TRkRfEECS+cK3X+g4vrvfUx4DYIukEF6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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