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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4326b7cbb378f22730785ceaa9baa051c8728ea8d8a6ecab15d1f02a4f988ba2' 
  AND token = 'l81tZCeVslc7F9aui/Ugp5+ldxE4wPIEDuMrt4QASSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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