Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d7e5ed4f67e15411dcb25e589cf30e85f232141f89bdb1254475f5552bc77ef' 
  AND token = '7ReTslhwAlYyAvxrEjBfCLd6/ZGv+dYR5lXShDV6yyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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