Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91772a7508d7e8c8f5867c0894b3b22751c3fc59331b943588e37c71ad60183b' 
  AND token = '233T2A4mjazuXo4VuzF6ZneuxcfST3UG2MQHHGejHrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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