Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c0b493dad6f0e0185ad1dbdf577f70349d91882ddec1f4ddc6d08ffef70abe4' 
  AND token = '3fmbcQAgoPM9Y0nooK7od2swFTa5TAtYxc6fNc7r5/Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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