Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e95c925fc0178e4ef236d82ebe676e57b3e9bd93bfcc0cba56612a7bec0205a9' 
  AND token = 'n+HPLON8N7ORey3PIWwIf7PzeC4ajYYOnnvYn5bz4iI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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