Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b7dc1374c20e7910f9b306733f1bbda177d0376372816492600eda22dca1f2e' 
  AND token = '7ybA3csVqqqqTL8gJlHBsaCQgWcFmJZaBQeu1shSob0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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