Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '261b943c4bc6df4ea89fc3cd4c80dcbdd9944052ad287d9400a5efd8e62b002f' 
  AND token = 'jc3hU/DlhGX1uA6pr7gMbVTTB9COHGJPNN/ErntmKQE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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