Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58e3492319ec4e6e2244166761531c496c8716f70a33e551076bcc8f155a8647' 
  AND token = 'AyUruWZ7tL4KT9J3V/u2IGk3Ie3eUdyqnP7p1JmTZ+Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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