Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07d5ffe3ef5c5c5c54ef1b001e61e6f6db71974d40b17a83607eee5b203bca38' 
  AND token = 'gxri6+YZPWaL5/D19FZhYUV03mbKkjw9n7MipZ0nn5I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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