Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5dce05cedbbd8f01afca4dee235bdc26ccd3178f1435d16acd93487b77eb626' 
  AND token = 'BOf8YSSnVIikN/5F3j7X+mt56JTDWDo3kDcIiZpQ9BA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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