Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f00d74ecd89e05415945a8eb939ca59f7d149b3cb5f90fadf32950b081f88dd' 
  AND token = 'yvzFrjS/DaZy9dGUksa0WZSPbRWm2P9kYYs+wjzwo4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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