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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'caf85dcab7e4af0f02b16f11ab0d6d1facbe027129846001ce0ca08c9659020d' 
  AND token = 'iaETBm95ZDtuP7WM4w5vhpQtQ5TMTNJolnPizAcw9sw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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