Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ba0c973da6acd7ab8f5310262a4bc2bc7011a164d72f6514e2549855c6cd1f9' 
  AND token = 'rNZLzdB537Ld2gsw2RQXHQmJJI49RogzofHusH7uTBY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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