Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da15be349f1daafc4cac6ddbd6a933721c540e77ab6b878a263e214669fd4ad5' 
  AND token = 'V8vIU7jt4KQaY367LXXIBeLshAmWLWiFBD3KSXKjj0Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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