Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cea4dc09f33817563b660a0bc1801badc5d5098a03cba3602808f7e12884f8f' 
  AND token = '4c/OCDD7vrR8laMfwuDq5W0VJXy/4fyerVARjYeF2SU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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