Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c9845ea260cf162c96b9e0f9ab0e9efbc297018d1e59a5490e4eb49ecdc5836' 
  AND token = 'ciLuvvaUMOQHTO6kEZGi6TKXfFl0uvz/CR1nBwY9qW8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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