Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d6e75d981a7e4653501c9632533478afd61b4ad1e4c9135ee6ee5d5f8645aff' 
  AND token = 'jKEL1ju/v7uc/su4uc2blY5MTzAUQFg7cDlgUV7kJg0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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