Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40b0040a2fc2926e10fedfba8c211dec41ff37e08ad216ef1ba31c2a0cb2b5d1' 
  AND token = 'KCI8SKe2GQqIHgm6rZmTd8krvqpF7X8q2Yfn9j+m/nE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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