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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34266411926062ff92dc6201305d512c101a782758b4549d9bd0ee0998e376e9' 
  AND token = 'XxP6SzQt18dqu/WT9488Mym6+Lb8+tuReTWcuTHtaF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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