Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d9cb1e9eeadd6678e68ce366b6e2e6bb90d35018a3e92ae51e7760179b6e84e' 
  AND token = '8hBfqep2KIAFoiNc0jxXG7PDYD+0mKJjg9Wgla2a5DM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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