Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8ee93105d4cfb75ccfecaa4337d5f9e533cc95d61f03ca327527792e4efb0a0' 
  AND token = 'TRpY+SBApp3xKim0YX8bd0dDqV5Eojmn/q6UJCdoq+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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