Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0263ad16865883be2a5f949f519f351393115597db39441be01102ba498e7ee6' 
  AND token = 'ZnHbIGqtXxTZMbEqpQX4McQoq4mCoWPykhPUMIyI7HY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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