Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5543338616a22594658647f5bb26a4c94a77e9105f69b2a1cddf16da019044b' 
  AND token = '8SqFJWQSoWKPsUxeuU6imgMHHUpuY/UI6HLFrhtsmIU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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