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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e732204a46a199226fcb38e97d3757a065659eaf3a7634e59af9dc6a1cc6983e' 
  AND token = '9dUyKMTbQBltCqBCC+tG/mTJMsBkP9QX1IXKZoWkL9A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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