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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0235c0def4e7fe9351b1145790b2dd1be4357ebe4bb6b1ba79dc023344aaccea' 
  AND token = 'gidJQSJzgtUJZ/66ZfC/KqK28YRrQXRcX+4eJmbVy5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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