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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed0b8d528d6659ffc5c20b9a880d8fa580f005f35449528bca96ca1a1c6905a2' 
  AND token = 'viawZONnZrzDJBFhTxraHzXN+7IPEJ92btXqa0xecK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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