Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1055d0387979c19bde42e1453e8917d8324f78a5796aa899c677894afa6d7ec8' 
  AND token = 'XclBxsJrFGgtx/NAX2J3eyMOCm4As/O7GEjKadLLb6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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